Fig. 1
From: Heterogeneity of post-COVID impairment: interim analysis of a prospective study from Czechia
Left side: post-COVID stratification groups. (A) No respiratory symptoms, no objective signs of pulmonary involvement (PI), (B) respiratory symptoms without objective signs of PI, (C) no respiratory symptoms but objective signs of PI, (D) respiratory symptoms and objective signs of PI, (E) extra-pulmonary symptoms (additional mark to group A–D). Example of use—a patient with persistent cough and fatigue without objective signs of PI is classified as B/E. Right side: results of applied use of post-COVID stratification on our study patient cohort